Experimental Investigation of Orifice Diameter, Swirl Generator and Conical Valve Shape to the Cooling Performance of Ranque-Hilsch Vortex Tube

2014 ◽  
Vol 510 ◽  
pp. 174-178 ◽  
Author(s):  
Nurhasanah Ismail ◽  
Wirachman Wisnoe ◽  
Muhammad Fairuz Remeli
Keyword(s):  
Experimental Investigation ◽  
Vortex Tube ◽  
Orifice Diameter ◽  
Cooling Performance ◽  
Swirl Generator ◽  
Shape Influence

This paper is about experimental investigation of the orifice diameter, swirl generator and conical valve shape influence the cooling performance of Ranque-Hilsch vortex tube. From the experiment, its shows that conical valve shape has smallest effect on cooling performance (0.124) of the Ranque-Hilsch vortex tube. It also revealed that swirl generator gave the greatest (0.336) effects to the cooling performance of Ranque-Hilsch vortex tube and have the highest range of difference cooling performance (0.027 to 0.229) compare to conical valve shape (0.073 to 0.087) and orifice diameter (0.009 to 0.012).

Experimental Investigation on the Effect of Orifice Diameter and Inlet Pressure to the Ranque-Hilsch Vortex Tube Performance

2013 ◽  
Vol 465-466 ◽  
pp. 515-519 ◽  
Author(s):  
Nurhasanah Ismail ◽  
Wisnoe Wirachman ◽  
Muhammad Fairuz Remeli
Keyword(s):  
Experimental Investigation ◽  
Temperature Difference ◽  
Mass Fraction ◽  
Vortex Tube ◽  
Cold Temperature ◽  
Inlet Pressure ◽  
Orifice Diameter ◽  
Cold Mass ◽  
Isentropic Efficiency

In this experiment, the cold mass fraction, cold temperature difference and isentropic efficiency of Ranque-Hilsch Vortex Tube were investigated and measured. Three different inlet pressures (absolute) (296633 Pa, 394699.5 Pa and 492766 Pa) and 2 type of orifice diameter (4 mm and 5 mm) were used. 5 mm orifice gives higher value of cold mass fraction (μc = 0.7067) compare to 4 mm orifice (μc = 0.3264). It is also no significant effect in cold mass fraction by changing three difference inlet pressures. 4 mm orifice has higher cold temperature difference (ΔTc = 18°C) compare to 5 mm orifice (ΔTc = 8°C) at highest inlet pressure (492766 Pa) that were used. 4 mm orifice has higher isentropic efficiency (ηisen=0.17545) compare to 5 mm orifice (ηisen=0.0834). For both orifices, the highest isentropic efficiency was obtained when the lowest inlet pressure (296633 Pa) were applied.

An Experimental Investigation of a New Hybrid Film Cooling Scheme

2010 ◽  
Author(s):  
M. Ghorab ◽  
I. Hassan ◽  
T. Lucas
Keyword(s):  
Experimental Investigation ◽  
Film Cooling ◽  
Hybrid Film ◽  
Density Ratio ◽  
Thermochromic Liquid Crystal ◽  
Hybrid Scheme ◽  
Cooling Performance ◽  
Average Heat ◽  
Bending Effect ◽  
Turbine Airfoils

This paper presents an experimental investigation of the film cooling performance of a New Hybrid Film Cooling Scheme using Thermochromic Liquid Crystal technique. The new scheme has been designed to improve the film cooling performance of gas turbine airfoils. The scheme includes two consecutive film hole configurations with interior bending. The cooling performance of the new scheme was analyzed across blowing ratios of 0.5, 1.0 and 1.5, at a density ratio of 0.94. The results showed that the new scheme enhanced the local and the laterally averaged film cooling performance in terms of effectiveness, and net heat flux reduction in compared to other film hole configurations. The bending effect of the new scheme throttled the secondary flow causing it to spread widely over the downstream surfaces, hence enhancing the film cooling performance at low and high blowing ratios. The hybrid scheme provided an average heat transfer ratio near unity over the downstream surfaces at low and high blowing ratios.

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